// toggle elements and images (used on FAQ list)
function coll(elid,imageid){
    var el, image;
    if(el = document.getElementById(elid)){
	if(el.style.display == 'block'){
	    el.style.display = 'none';
	    if(image = document.getElementById(imageid)){
		image.src = 'images/col_closed.gif';
	    }
	}else {
	    el.style.display = 'block';
	    if(image = document.getElementById(imageid)){
		image.src = 'images/col_open.gif';
	    }

	}
    }
}